Water-heating apparatus



Oct. 29, 1929. A. PFENDER WATER HEATING APPARATUS Filed July 1926 3 Sheets-Sheet l a W 5 W i.

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Oct. 29, 1929. A. PFENDER- WATER HEATING APPARATUS Filed July 8, 1926 3 Sheets-Sheet 2 ITDfQ 16?. @444 @FMM Oct. 29, 1929. A. PFENDER WATER HEATING APPARATUS Filed July 1926 5 Sheets-Sheet 3 III/II v '4 4 r 1 i A Patented Oct. 29, 1929 UNITED STATES PATENT OFFICE ADOLPH' PFENDEB, OF CHICAGO, ILLINOIS, ASSIGNOR TO FERGUSON AND LANG-E FOUNDRY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS WATER-HEATING APPARATUS Application filed July 8, 1926.

My invention relates to water heating apparatus used in connection with boilers or heaters for furnishing a separate supply of hot water. For example, my invention may be used in connection with a hot water heating plant for supplying hot water for domestic purposes.

It is the object of my invention to provide a new and improved form and arrangement of parts by which satisfactory results may be obtained with respect to the heating of a proper supply of water, and by which the danger of damage to the coil by overheating and the danger from the generation of steam may be reduced to a minimum or entirely avoided.

It is one of the objects of my invention to improve apparatus of this type with respect to the method of installation. In connection with some types of boilers, it has been found necessary heretofore to provide openings in both the front and rear ends of the boiler 'for the installation of the apparatus for heating an auxiliary supply of water, to insert pipes through the boiler from end to end thereof, and to make outside connections at both of such ends of the boiler, such connections being ordinarily made by welding stuffing boxes on the outer faces of the boiler walls at each opening through the wall. This type of installation has been very expensive, particularly in many cases where access to the rear end of the boiler has been very poor. It is the object of my invention to provide a construction of heating apparatus which can be built substantially complete at the factory and installed without any considerable amount of skilled labor at the boiler by work at the front end only of the boiler. It is another object of my invention to provide a construction of this type particularly adapted for use in connection with boilers or heaters having hot water chambers at opposite side faces of the structure, such chambers being quite deep and narrow so as to afford only limited space for reception of the heating coils. It is another object of my invention to provide an improved method of installing apparatus of this type.

It is stlll another object of my invention to Serial No. 121,118.

improve devices of this type in sundry details hereinafter pointed out. The preferred means by which I have accomplished my several objects are illustrated in the drawin and are hereinafter specifically describe That which I believe to be new and desire to cover by Letters Patent is set forth in the claims.

In the drawings,

Fig. 1 is a view, somewhat diagrammatic, of a water heating apparatus embodying my invention and showing the front of a boiler or heater in connection with which my improved heating apparatus is used.

' Fig. '2 is a side view of the heater shown in Fig. 1, being substantially a section taken at line 2- -2 of said Fig. 1, but with arts thereof broken away for clearness of illustration.

Fig. 3 is a very much enlarged perspective vlew of a retainer plate adapted to be inserted into the heater casing for securing in position the coil of my improved heating apparatus, such retainer plate being insertable through the opening in which the coil is mounted.

Fig. 4 is a similarly enlarged perspective view of the bolt which cooperates with the retainer plate shown in Fig. 3.

Fig. 5 is a perspective view on a much smaller scale than that of Figs. 3 and 4 showing the coil and head member ready for insertion into the casing.

Fig. 6 is a perspective view of the tool employed for effecting the installation according to my method.

Fig. 7 is a fragmentary sectional I view through a portion of the vertically disposed outer wall of the casing of the boiler or heater illustrating one step of the installation of my improyed apparatus.

Fig. 8 1s a substantially vertical section, taken on line 88 of Fig. 7.

Fig. 9 is a view similar to Fig. 8 but showing the positions of the parts at the end of the installation; and

Fig. 10 is a horizontal sectional view taken at line 1010 of Fig. 9.

Referring nowto the several figures of the drawing in which corresponding parts are from the pipe 31, the pipe 32 being provided thecasing being indicated by the numeral 13 and the side wall being indicated by the numeral 19.

In the construction illustrated in Fig. 1, a

header 20 is mounted in transverse position across the front end of the boiler, such header j being connected with water heating apparatus-as hereinafter described for conducting the water from the header 20 into and out of the water legs of the boiler. Rising from such auxiliary water heating apparatus at the left in Fig. 1, there is ahot water pipe 21 leadingto faucets 22 and 23 on'the floors above the boiler. A return pipe 24 leads'from the upper end of the pipe 21 tothe header 20. At the opposite side of the boiler, a hot water pipe 25'rises from a similar auxiliary water heating apparatus, such pipe 25 having a connection with a storage tank 26 at the top of such tank. Rising from the tank 26 so as to carry hot water therefrom, I have provided a pipe 27 leading to faucets 28 and 29 from which a return pipe 30 leads back to the header 20. A pipe 31 leads from the return .pipe 30 for connection with the tank 26 near its lowermost portion, and a pipe 32 leads with a closure valve 33 of any suitable type.

In the construction shown, cold water for supplying the entire auxiliary water heating system is provided by a pipe 34 leading into the tank 26 near oneend thereof. A thermometer 35 is interposed in the pipe 27 in the apparatus from the pipe 20 is heated by its passage into and out of the water legs, such water being adapted to circulate through the system of pipes and through the storage tank 26 for insuring the heating of 'a suitable supply of the water.

As is bestshown in Fig. 1, the auxiliary Water heating apparatus as employed at each side of the boiler setting comprises a plurality of head members 36 connected in series by the pipes and fittings 37 in such manner that the water from the header 20 passes in succession through all three of the head members and the coils carried thereby as hereinafter described. As is best shown in Fig. 9, each of the head members 36 is in the form of a casting provided with two chambers 38 and 39, the pipes 37 being in communication with such chambers at their outer faces and coils 40 and 41 being in communication with such chambers upon the inner face of the head member. For the reception of the coils .40 and 41, the front wall 18 of the water chamber or the water leg of the boiler setting is provided with a vertically elongated opening 42 of such a width to permit the coils 40 and '41 to be readily inserted, as is shown in Fig. 7, but such as to be covered effectively by the head member 36 as is shown in Fig. 10, a gasket 4.3 of approved type being preferably inserted between the head member 36 and the outer face of the wall 18. As is clearly shown in Fig. 10, the head member 36 is held in operative position with the gasket 43 pressed tightly against the outer face of the wall 18 by means of a bolt 44 passing through an opening 45 in the head member, with the head of thebolt 44 in engagement with the inner face of a retainer plate 46 which engages the inner face of the wall 18, a nut 47 and a suitable gasket 47 being provided upon the bolt 44 for clamping the parts tightly together. 7

For the installation of the auxiliary water heating apparatus in a boiler of the type shown, special means has been provided. In the preferred method of installing a coil of the type shown in accordance with my inven-.

tion, I first insert the coils 40 and 41 part way through the opening 42 in the wall 18 into substantially the position shown in Figs. 7 and 8; I then insert through the opening 42 the bolt 44 and the retainer plate 46, the plate 46 being first threaded upon suitable connecting means the end of which is connected to the bolt 44. In the preferred form, this connecting means comprises a stiff rod or link 48 having a handle 49 at one end and a pivotally mounted screw threaded section 50' at its otherend, the section 50 being capable of connection with the bolt 44 by means of the screw threads. The retainer plate 46 is of such width as substantially to fill the space between the two legs of the coil 40, as

is clearly shown in Figs. 8 and 9 and is of such dimensions as to be incapable of passage through the opening 42 when in position upon the bolt 44. It is accordingly necessary that the connecting means'48 be shifted to the po- 'sition as shown in Figs. 7 and 8 so as to permit a sufficient tilting movement of the plate to enable it to pass through the opening 42. After the retainer plate 46 has been properly positioned against the inner face of the wall- 18 so as to bridge the opening 42, the bolt may be readily drawn into holding position with respect to the plate by first turning the link 48 so-that the axis of the pin holding the connecting member 50 will be substantially vertical, in which position there is little tendency for the bolt to get into a right angular position with respect to the axis of the opening through which it is to be drawn. The bolt 44 may then be drawn up easily to operative position with respect to the retainer plate. The link member is then to be disconnected from the bolt 44 and the bolt 44 is to be inserted through the opening 45 by a proper manipulation of the coil and head member. If desired, after the bolt 44 is in operative position in the plate 46, the link 48 can be disconnected from the bolt, inserted from the right through the opening 45, and then again connected with the end of the bolt so as to preventthe bolt from being accidentally pushed out of position. The gasket 47 and the nut 47 are then placed on the bolt and the nut tightened for clamping the head 36 and gasket 43 in position for preventing the escape of water through the openings 42 and 45. As is best shown in Figs. 9 and 10, the head 51 of the bolt 44 fits in a groove or recessed seat 52 formed in the inner face of the plate 46 so that the bolt 44 is held against rotation with respect to the plate 46. .The plate 46 in turn is held against rotation by its engagement with the coil 40 and also by the engagement of lugs 53 thereon withthe side walls of the opening 42.

By the use of my improved apparatus, a workman is enabled to insert an auxiliary water heating coil for support by the outer wall only of the casing of the water leg. The arrangement is such that the installation can be made and completed by work exclusively at the face of the boiler setting at which the insertion is made. The coil and its head member can be prepared complete at the factory and can be inserted and secured in place very readily without the use of any other than standard parts. The arrangement is such that the installation can be made just as easily in a narrow water leg as in one of larger width. It is accordingly possible to install an auxiliary water heating apparatus of this type at a conslderably smaller expense than that necessary in connection with constructions employed heretofore, and the formof the apparatus by which these results are made possible is accordingly deemed of importance.

I do not wish to restrict my invention to the detailed form of structure as shown in the drawings, except so far as certain of the claims may be specifically so limited, since it is evident that changes may well be made in the form and-arrangement" without departing from the spirit of my invention.

I claim 1. A waterheating apparatus, comprising in combination a head member having two chambers therein, a coil secured to said head member and communicating with the respective chambers and insertable through -a wall opening which said head member is adapted to cover, a perforated retainer plate insertable in one position through the wall openin and adapted in another position to bri ge the opening, and a bolt passing through said retainer plate with its head on the inner face thereof for clamping the head member in tight engagement with the wall.

2. A water heating apparatus, comprising in combination a head member having two chambers therein, a coil secured to said head member and communicating with the respective chambers and inseriable through a wall opening which said head member is adapted to cover, a perforated retainer plate insertable in one position through the wall opening and adapted in another position to bridge the opening, and a bolt insertable through said opening with said plate adapted by bearings on the head member and on the inner race of the wall to clamp the head member in tight engagement with the wall about the opening therethrough.

3. A water heating apparatus, comprising in combination a head member having two chambers therein, gasket means on the inner face of saidhead member, a coil secured to said head member and communicating with the respective chambers and insertable through a wall opening which said head member is adapted to cover, a perforated retainer plate insertable through the wall opening when tilted to diagonal position and adapted when in normal position to bridge the opening, a bolt extending through said retainer plate with its head on the inner face thereof, said bolt when in position in the retainer plate being adapted to hold the plate from the tilting necessary for passage through the opening in the wall, and a nut on the bolt adapted to clamp the head member and gasket means in tight engagement with the wall.

- 4. A water heating apparatus, comprising in combination a head member having two chambers therein, gasket means on the in ner face of said head member, a coil secured to said head member and communicating with the respective chambers and insertable through a wall opening which said head member is adapted to cover, a perforated retainer plate insertable through the wall opening when tilted to diagonal position and adapted when in normal position to bridge the opening, a bolt extending through said retainer plate with its head on the inner face thereof, said bolt when in position in the retainer plate being adapted to hold the plate from the tilting necessary for passage through the opening in the wall, a nut on the bolt adapted to clamp the head member and gasket in tight-engagement with the wall, and a second gasket between'the nut and the outer face of the head member, said retainer plate when in operative engagement with the bolt being adapted to hold the bolt from rotating.

5. A water heating apparatus, comprising in combination a head member in the form of a casting having chambers therein at its opposite end portions, an opening through the head member between said chambers, a

- coil communicating with the respective chambers and projecting from the inner face of the head member and insertable through an opening in a wall so as to permit the head member to be brought into contact with the wall, a perforated retainer plate insertable in one position through the wall opening and adapted in another position to bridge the opening. and a bolt extending through said retainer plate with its head on the inner face. thereof and passing through the opening in the head member for clamping the head member in tight engagement with the outer face of the wall. a

6. A water heating apparatus,.comprising in combination a head member in the form of a casting having chambers therein at its opposite end portions, an opening through the head member between said chambers, two coils one within the other communicating with the respective chambers and projecting in-the same plane from the inner face of the head member and insertable through an opening in a wall so as to permit the head member to be brought into contact with the wall, a'perforated retainer plate insertable in one position through the wall opening and adapted in another position to bridge the opening, and a bolt extending through said retaining plate with its head on the inner face thereof and passing through the opening in the head member for clamping the head member in tight engagement with the outer face of the wall.

7. In a Water heating apparatus, the combination of a head adapted to cover an opening in the wall of a receptacle for hot water, a heating coil connected with said head and extending through said opening for taking a stream of water from the head and returning it thereto, and means for holding said head in operative position completely covering said opening about said coil, comprising a pin and transversely extending retaining means on said pin adapted to be inserted through said opening into engagement with said wall with the transverse retaining means bearing on the inner face of the wall and with the pin extending outwardly for engagement with said head.

8. In a water heating apparatus, the combination of a head adapted tocover an opening in the wall of a receptacle for hot water, a heating coil connected with said head and extending through said opening for taking a stream of water from the head and returning it thereto, and means for holding said head and coil in operative position on said wall, comprising bearing means insertable through said opening into position in the inner face of the wall at opposit sides engagement with of said opening, other bearing means adapted to engage said head, and means for-rigidly connecting said two bearing means.

9. In a water heating apparatus, the com bination of a head adapted to cover an opening in the wall of a receptacle for hot water, a heating coil connected with said head and extending through said opening for taking a stream of water from the head and returning it thereto, and means for holding said head and coil in operative position on the wall, comprising bearing means insertable through said opening into position in engagemert with the inner face of the wall at opposite sides of said opening, other bearing means adapted to engage said head, and means held rigidly against movement with respect to one of said bearing means toward the other bearing means and having screw threaded connection with said other bearing means for tightening said head member against the outer face of the wall inposition to cover said opening.

10. In a water heating apparatus, the combination of a head adapted to cover an opening in the wall of a receptacle for hot water, a heating coil connected with said head and extending through said opening for taking a stream of water from the head and returning it thereto, means insertable through said opening into position in engagement with the inner face of the wall at opposite sides of said the ends of its arms connected with said head Y and insertable through said opening for taking a stream of water from the head and returning it thereto, bearing means insertable through said opening between the legs of said coil into position-in engagement with the inner face of the wall at opposite sides of the opening, other bearing means engaging the outer face of said head, and means held rigidly against outward movement with respect to said first named bearing means and having screw threaded connection with said second named bearing means for tightening said head member against the outer face of the wall in position to cover said opening.

ADOLPH PFENDER. 

